Tagged: data

Big Data is the BuzzWord. Can We Trust Regression in Amenity Valuation? 13

Can We Trust Regression…

I would like to give a background as to what prompted this article. A few years back, word on the street was that the Collateral Underwriter was going to be using big data collected directly from our reports from the inception of UAD to aid in determining what should be “reasonable adjustments”. In order to be preemptive, I consulted an acquaintance of mine who just so happened to have a PhD in Statistics from Princeton. We worked through a number of real case scenario data sets to try and figure out if there was a way I could use regression...

Property Selection for analysis & Statistics in Appraisals - Appraisers Blogs 10

Property Selection for Analysis & Statistics

The importance of proper property selection and ‘statistics’ in appraisals… Appraisers, I would like to direct you to info written by Mr. George Dell in his latest blog post circulated on July 3, 2019. This is one of the best explanations I’ve seen him write on this topic, of how to select and analyze properties when doing appraisals, and why correct ‘statistics’ presented in reports is important. I first became aware of the importance of proper property selection and ‘statistics’ when I attended an appraiser’s training class in 2008 in Las Vegas. The primary speakers were Mr. David Braun and Mr. Patrick...

Should Appraisers Study Statistics? - Beyond the Old Inferential Statistics 11

Should Appraisers Study Statistics?

Yet what was (and still is) presented in appraiser education is the old inferential statistics. Difficult statistics. Convoluted statistics. Statistics for appraisers started to become a hot topic some 15+ years ago. I was more involved with the Appraisal Institute then, and often argued that with the changes in data sources — appraisers would have to learn to apply statistics. Around 2003, the AQB (Appraiser Qualifications Board) revised qualifying education to include the requirement for Finance, Statistics, and Valuation Modeling class. Although I was not solicited to write this class, I was put on the development team, which reviewed and suggested edits and improvements. The...

Didja Know... Zillow is Better than Eyes! - Discern Quality Using Photos 33

Didja Know… Zillow is Better than Eyes!

How in the heck is Zillow supposed to discern QUALITY of these homes, and then magically produce a presumed value, when there is no actual data upon which to base a decision? Maybe it’s done with smoke and mirrors, rather than eyes? Appraisers, I was busy churning out reports, and didn’t have time to send out this bit of news about Zillow earlier: Zillow is watching: New algorithm uses photos of your home to check quality and curb appeal. Zillow is now claiming “it” can discern QUALITY of a home, just by looking at various photos they obtain from various sources! They...

MLS System under Cyber-Attack 3

MLS System Under Cyber-Attack

Appraisers, I belong to several appraiser forums, with active participation among appraisers. On Wednesday June 12, 2019, per a forum posting, the MetroList MLS (which uses Rapattoni data) was hit from an outside cyber-attack. This MLS provides service in central California around the Sacramento region. The cyber-attack caused property data to become unavailable via web sites – to appraisers and real estate agents. The MLS posted this message: The MetroList computer network that supports Prospector MLS is down as a result of a cyber-attack. The MetroList team is working at a very fast pace to resolve and restore services as...

Will the Cost Approach be Required in the Redesigned UAD Forms? 41

Returning to Requiring the Cost Approach

…the Cost Approach is the most INACCURATE of the three current ‘Approaches’ we use… Appraisers, for the past few weeks, emails have been sent by a third party asking appraisers to complete a survey about the appraisal process and the current forms. I did so; you should also. But I wanted to expand on one aspect of the survey. Two separate questions, on different survey pages, related to the Cost Approach (CA). These questions wanted appraisers to state their opinion about 1) if the forms provide adequate detail to develop a CA, and 2) if it is or is not...

Science & Art Reflect our Search for the Truth - Is There an Art in Science? 8

Is There an Art in Science?

We know there is science in art. Musical scales. Perspective and the golden ratio. The ordered sequence of a good novel. It’s difficult to be a good artist without knowing, or at least intuitively applying the truths found in the logic. Both science and art reflect our search for the truth. Our primal human nature is to resist the truth, even as it hits us in the groin. Resist the change. Fear. Give up something that has protected you. Something that gives you a place. A belonging. A prestige. An ego. A place where you are respected. Then someone or something comes along and says there is a better way. I...

Appraiser vs Machine - The Appraiser Cannot be Replaced by a Machine 4

Appraisers vs. Machines

Collateral risk analysis (appraisals being a key element of that) is partially art, partially science. Those two facets are blended inseparably, like a soup…the ingredients can’t be separated. While computers can undeniably perform certain tasks better than humans (such as the handling of large amounts of data) appraisers can perform other absolutely critical aspects of the process better than a machine. The appraiser can actually see the property to be valued, they can utilize their human senses, they can use their judgement based upon what they observe by physically being at “ground zero” (the Subject property), and can then apply...

USPAP Everyday Violation... Are You Violating USPAP Every Day? 15

Are You Violating USPAP Every Day?

Are you in “violation” of USPAP? If you pick comps the old way, you may be violating USPAP every day! The old way of selecting data worked well for the old days. Gather seven or eight that look good, go look at them, make a couple of phone calls, and pick four or five for your report. That was the way I was trained. That was the way the Appraisal Institute courses taught me. When I took the AI demo report course, three words were drilled into me: Explain, Justify, and Support. Then I took the required USPAP course. (Back then it still belonged...

Hybrids' Indicated Value & USPAP Coup de Grace, Better off at McDonalds 29

I’d Be Better off at McDonalds

…they provide no documentation as to how their algorithm produces this indicated value… I had to “jump in the pool” and see what these bifurcated appraisals are all about. The names have been withheld to protect the guilty. I recently completed a “bifurcated” report for one of the AMC’s providing this type of service. The form is to be completed on their site and they recently upgraded to the “new and improved” report on their portal as of January 1, 2019. The subject is sited in an urban location and while not an anomaly per se, does display features such...

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